Lab 13

Analyse several voltage and current situations in different loading scenarios in a simplified radial (transformer to consumption) medium-voltage power system example. There are only 2 nodes in the 35 kV line – node 0 from the 110/35 kV and node 1 with one consumer. The physical characteristics of the line and the loading scenarios are individualized for each student – please see the attached file Excel “WM9P3 Task1 data” for your particular data set.  Briefly reflect on the complexity of the calculations for known input or output voltage, as well as for fixed or voltage-dependent consumption in this simple power system model.  Analyse and discuss the sensitivity of the voltage drop [in % of amplitude and the degrees of phase] with respect to the current level [in %] and to the power factor.

Q4/ (A) What is the voltage measurement Vx-y , for the circuit shown below. 4v 4v 20 50 y

subject

The symmetrical short circuit current is ______________________ quantity in nature. a-Exponential b-Ramp c-Alternating  d-Direct

please create a venn diagram using words given in the box to contrast and compare electric motor and electric generator

id 15186 18course id- 18678 18content id 220760 18question rum t Apps M Gmail YouTube Maps Remaining Time: 53 minutes, 27 seconds Question Completion Status: A Moving to another question will save this response. Question 6 In a capacitive load, the current angle: Lag the voltage by 90. In phase with the voltage angle. Between 90 and -90. Leads the voltage by 90. A Moving to another question will save this response. docx. . . . اختبار الاقتصاد النه docx. . اختبار الاقتصاد النه A ll slaislI Lisl.docx aill slail lil.docx aill sle ENG 4) A ETVIE 69 R T Y U O OP S F G K 1S 16

Transmission and distribution lines are important components of any power system study. Aluminium cable steel reinforced (ACSR) (with steel in the centre – as shown in Figure Q1 is normally chosen instead of copper for transmission Explain: (a)The choice of aluminium instead of copper (b)The need to use and place steel at the core

Identify and describe the step-by-step process used to pull cable and also describe the step-by-step process used to install cable in buildings? Note: Please do not handwriting

Kindly answer all parts

Problem 3: Commutators (. Solve for the commutator: (a) [Sz, §°] (b) [§2,1] (c) [§2, P,] (d) [$,, P,] (e) [$», §,]

Some electricians do not bother to calculate the minimum size of neutral service conductor. They size the minimum ungrounded conductor size and then use this information to determine the minimum neutral conductor size. Explain how they determine the minimum neutral size using the minimum ungrounded conductor siz

EMF in a circuit is ____. a. Cause current to flow b. Maintains potential difference c. Increases the circuit resistance d. Decreases the circuit resistance e. None of the Choices

TOPIC: Power Systems, Power Plants & IlluminationINSTRUCTIONS:- Answer in this format: Given, Illustration, Required Conversion, Solution, Final Answer.- Step-by-step solution, do not skip even simple calculations to avoid confusion.- If answered in written form, make sure it is readable.PROBLEM: A generating station has two 50 MW units each running for 8,500 hours in a year and one 30 MW unit running for 1,250 hours in one year. The station output is 650 x 106 kWh per year. Calculate the utilization factor. 0.732 0.653 0.811 0.795

The X/R circuit ratio of an automatic reclosure is inversely proportional to the asymmetrical factor True False

Question 3 and 4

The system having ±0.5% of F.S.D if the full scale deflection is 50 units, then accuracy is _____ a. ±0.25 b. ±1 c. ±0 d. ±0.5

Problem 2.5: ABS-R2 redundancy class of ship depicted in Figure 2.5 has the probability of each side losing power due to failure or planned main- tenance equal to 3% over one year. Determine the probability of the ship going dark-having no power at all-over a one-year period.

In your own words and from your own understanding, avoid plagiarism or copying from the Course Material, distinguish DIRECT BURIAL, TROUGH, and TUNNEL for UNDERGROUND POWER SYSTEMS.

QUESTION 2: What is the approximate voltage amplitude and frequency of the waveform below

a) A ___ is an individual wires from machine to machine, with many different wiring patterns in use. b)  The ____ results in a material that can supply additional electrons to the materials or creates “holes” in the material crystal properties. c) Electromagnet produces magnetic field when supplied with voltage. Select one: True False

Given an air gap with cross sectional area of 0.5 square centimeter, and mean magnetic length of 0.1 centimeter. The reluctance of the air gap is equal to ____." 17.8 million H-1    12.2 million H-1    15.9 million H-1    13.1 million H-1

3. Peak time is the time required for the response to reach the first peak of the overshoot. * True False 4. The loops called non toughing loop if they have many node in common. True False 5. First type system has a zero static steady state error when the input function is a step function. * True False

the course is power transmission system... Question : Differentiate between capacitance grading and Intersheath grading? dont just copy from google. thanks :)

Q: 1 Choose the appropriate answer(s). (CLO1-1, PLO-2, CL-4) a. Check all statements that apply (points can only be obtained if all boxes are checked correctly) Wind power ... (a) .is uncertain (True) (False) (b) ...is intermittent (True) (False) (c) ..is random (True) (False) (d)..can be forecasted (True) (False) b. If everything else remains constant, when a significant load is added to the system the generator rotating speed (a) Slows down and as a result the torque needs to be increased to keep the frequency (b) Speeds up and the resulting torque can be used to produce more energy (c) Speeds up and the turbine must slow down the generator to prevent damage c. The Hellmann formula describes . (a) solar irradiance depending on the thickness of the cloud cover. (b) the failure rate of power transmission lines depending on their length. (c) wind speed depending on height above ground. (d) the peak-to-average rate of load in a distribution feeder depending on average load. d. An…

(ii) An overhead transmission line is supported at a river crossing by two towers of height 35 m. The weight of the conductor is 0.307 kg/m. The weight due to wind is 1.3 kg/m. The ultimate strength is 1400 kg and factor of safety is 3. If the Span length is 130 m. Determine a) Total weight of the conductor Answer for part 1 b) Sag Answer for part 2 c) Total Length of conductor between supports Answer for part 3 d) Clearance between the lowest point on the conductor and water level.